waitAndEval

`waitAndEval`

A simple mechanism for step by step illustrations.

You can use it in aa loop: waitAndEval II

<!DOCTYPE html>
<meta charset="utf-8">
<title>waitAndEval</title>
<style>
#messageText{
  font-size: 60px;
  text-anchor: middle;
}
</style>
<body>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script>

// ----------------------------------------------------------------------

var width = 960,
    height = 500;

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

var messageText = svg.append("text")
    .attr("id", "messageText")
    .attr("x", width/2)
    .attr("y", height/2);

function write (text) { messageText.attr("class", text).text(text) }

function newWaitAndEval () {
  var t = 0;
  return function (foo, dur) {
    t += dur
    setTimeout(foo, t)
  };
}

</script>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js